Is (5, 4) a solution to the equation y = x − 1?

yes or no

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Simplify the expression. -2/5(10+15m-20n)

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.